Drop-movement for trip-hammers.



PATENTBD SEPT. 22, 1903.

No. TSQSL D. MBLGHER.

DROP MOVEMENT FOR TRIP EMMBRS.

Arrmoulon FILED AUG. 30.19%.

X0 MODEL.

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umlhlll llll in vanto?,

iin. 7539,'3'31.

UNITI-3D STATES atented September 22, 19O. I l

PATENT OFFICE.,

DANIEL MELCHER, oF BoNEsTEE'L, SOUTH DAKOTA.

SPECIFICATION forming part of Leu-.ers Patent No. 739,331, datedsep-teintes a2, 190e.

Application fina August 30.1902. semi No. 121.629. (No man.)

To @ZZ whom/,zit may concern.:

Be it known that I, DANIEL MELdHER,`a

citizen of the United States, residing at Bone- This invention is animproved construction-V of drop-movement particularly adapted fortrip-hammers, drilling machinery, and similar mechanisms where a quickand sudden ydrop is desired.

The object of the invention is to provide an exceedingly simple andhighly efficient device by means of which the weight to be raised can beevenly elevated and suddenly dropped without subjecting the mechanism toany sudden or unusual jar.

Another object .of the invention is toprovide a construction in whichthe parts liable to wear can be quickly and easily replaced whenevernecessary.

With these objects in View the invention consists in thetnovel featuresof construction and combination hereinafter-fully described, and pointedout in the` claims.

In the drawings forminga part ofthis speciiication, Figure l is aperspective view illustrating the practical application of my invention.Fig. 2 is a sectional elevation illustrating the initial movement ofthedouble cam upon the single cam. Fig. 3 is a View illustrating theposition of the cams at the end of the elevating operation; and Fig. 4is a detail perspective view of the single cam, illustrating thedetachable heel-piece.

In order to show the practical .application of my invention, I haveillustrated only so.

much thereof as is necessary to explain the relative positions andoperations of the several elements, and by referring to the drawings itwill be noted that-I have arranged the mechanism upon av main framecomprisfaces and two straight faces, the straight faces being providedwith metallic face-plates K', the outer ends of whichproject a shortdistance beyond the ends of the cam-blocks, as most clearly shown at K2.v

LY indicates a single cam mounted upon a shaft-L', which is journaleduponthe main frame, .said cam having a single curved surface which isadapted to contact intermittently with both of the curved surfaces ofthe double cam K. Upon the inner end of theshaft L is a crank-arm M, towhich the16 lower end of the pitman N is connected,vthe upper end ofsaid pitmanbeing pivotally connected to the walking-beam, as mostclearly shown. Uponv the outer end of said shaft is a brake-wheel O,having a brake-lever P held in contact therewith by means of a spring Q,the brake-wheel 0 being essentially in the form of a ratchet-wheel, thepurpose being to prevent any backward movement of the cam- Shaft L.

shoulder L3, adapted for engagement with the projecting end K2 of theface-plate K.

In operation one member of the double cam K bears down upon the VsinglecamL, rotating the same, and in sopdojing the crank-arm M is carriedaround,elevating the pitman N, and consequently the walkingbeam. Thestart of this movement is indicated in Fig. 2, and owing to the shape ofthe cams the said movementwill be very gradual, so that the power willbe greatest at the point where it is needed mosh-namely, at thelbeginning of the .elevation of the working partsand at the powerobtained. By the time the end of .the cam lK reaches the heel of the camL the The heel of the cam L is cut out to" ,receive a metallicheel-plate L2, whichhas a such time speed can readily be sacrificed for`connected'thereto drop by their own weight, y

.there being nothing whatever to check the drop, and the toe of the camL is again brought around ready for engagement with the second sectionof the cam K, so that at each revolution of the cam K the cam L will beoperated twice. The cam-faces are preferably smooth,

thereby insuring a steady action, and by hav- IOO ing the face-plates K'and the heel-piece L2 detachable the said parts can be quickly andeasily removed and replaced Whenever they become worn. It will .thus beseen that I provide an exceedingly simple and highly eflicient dropmechanism and one in which any form of driving power may be employed.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the UnitedStates, is-

1. In a mechanism of `the kind described5 the combination with thedouble arm having face-plates upon the flat faces thereof, a single camhaving a heel-plate provided with a shoulder, the ends of theface-platesbeing

